A terrorist calling himself the Serpent unleashes sarin gas in a Detroit restaurant during the breakfast rush, killing 52. Called in to “investigate, coordinate and evaluate,” Homeland Security troubleshooter Derek Stillwater finds himself assigned to work with FBI babysitter Jill Church.

The FBI doesn’t trust Derek and it’s Jill’s job to isolate him from the investigation. But when the Serpent contacts the press demanding a ransom or he’ll set off an even larger attack, Derek and Jill are on the frontlines of a race against time to prevent the next attack… and the one after that…